This is the first part of a series of posts that show an analysis of practical circuits that use an operational amplifier (op-amp).
The operational amplifier, or op-amp, has great utility on electronics. In this post, it’s shown the operation of this integrated circuit (IC).
The two shown projects to make LED effect using the Johnson counter 4017.
Why does the electrolytic capacitor has polarity? Why there is a voltage limit? These and other questions are answered in this post.
The MOSFET is another type of field effect transistor. Much more used than JFET and it’s the most important component for digital computers.
The junction field effect transistor (FET) is a component with many applications. In this post, are shown the structure and the operation.
The common base is little known configuration for amplifiers using BJT. This type is used in high frequencies.
In this post, it is shown another type of amplifier configuration using BJT. This time, it is the common collector or emitter follower.
In this post, it is shown how to design a BJT amplifier with voltage divider on common emitter mode. Two examples of projects are presented.
In this post, are shown 2 circuit projects: an AC voltage detector and a cooler with LED effect.